Feeding mechanism for sewing-machines.



D. S.-SEYMOUR. FEEDING MECHANISM FUR SEWING MACHINES Patented June 29, 191-5;

5 SHEETS-SHEET] APPLICATION FILED MAR. 30, 1908. 1,144,797.

w "Wk-i y wit magma I q D. S. SEYMOUR. FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAR. 30, 1908. 1,144,797. Patented June 29, 1915 5 SHEETS-SHEET 2- D. s. SEYMOUR. FEEDING MECHANISM FOR SEWING MACHiNES,

APPLICATION FILED MAR. 30. 1908. 1,144,797. Patented June 29, 1915.

5 SHEETS-SHEETS.

mitten:

D. S. SEYMOUR. FEEDING MECHANISM FOR SEWING MACHINES.

, APPLICATION FILED MAR. 30, 1908. 1,144,797.

Patented June 29, 1915.

5 SHEETS-SHEET 4.

DQS. SEYMOUR. FEEDING MECHANISMFOR SEWING MACHINES.

APPLICATION FILED MAR. 30, 1908.

5 SHEETS-SHEET 5.

anuzntoz witmzosu Patented June 29, 1915.

DUDLEY S. SEYMOUR, 0F OAK PARK, ILLINOIS, ASSIGNOR TO UNION SPECIAL MACHINE COMEANY, CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FEEDING MECHANISM FOR SEWING-IMACHIbl'ES.

Specification of Letters latent.

Patented June 29,1915.

application filed March 30, 1905. Serial No. 424,120.

w z it may concern:

*n that I, DUDLEY S. SEYMOUR, the United States, residing at in the county of Cook, State of ave invented certain new and. usero .'cincnts in Feeding Mechanisms .ng-hlachines, of which the followdescription, reference being had to panying drawing and to the letters of reference marked thereon.

. L -on relates to feeding mechae especially feeding mecha- 3e used in connection with ,niechanism. 3 my invention is to provide a n ofthe four-motion type, a work-feeding movement practically ugh the entire stroke of the feed dog. which work-feeding movement shall also be substantially parallel with the work support.

A further object of my invent-ion is to provide a feedingniechanism which shall receive its vertical or fabric-engaging movement" from a swinging link, so disposed and operated as to give a feeding movement to the 1 dog, which is substantially parallel l the. work support.

. 1 part be obvious and will in part be hereinafter more fully described. v

in the drawings, which show byway of n oneembodiment of my inve'n re 1 is a front view. of a fiat bed sewing machine, having my feeding mecha-' nism applied thereto; Fig. 2'is a top plan view of the-feeding mec'hanismand its openating means; Fig. is a detail, partly in section. showing the feed bar and its operating in side elevation; Fig. 4: is a 1 of the parts in a different posiis a detail of the means for givd dog its vertical movements;

mechanism similar v mimetic view on an enlarged J pat n of inonenient' of the.

u 't-her objects of my invention will in e *tly in section, showing eeding mechanism applied to inc of the end cylindertypeg".

iew of the feeding mecha rig. Fig. 8 is adetail of:- nism shown in Fig. 6; and

5. aha my ling proved feeding mechanism may be used in connection with any type of sewing machine, whether a flat bed machine, a cylinder machine, or any other type of machine, andthat in the present embodiment of my invention, said feeding mechanism is shown by way of illustration only in connection with a flat bed and a cylinder machine. It

should also be understood that'other forms of stitching mechanism may be .used in con nection with my feeding mechanism and the stitch-forming mechanism herein shown is only by Way of illustration.

In Fig. I, the bedplate 1 has rising there from an overhanging arm 2, 01l Wl1iGll iS pivotally mounted a needle liiF KgWlikh' operated from the main shaff tiliy' asuitable link 5. At the forward end of the over hanging arm 2 is a needle bar 6, -carrying a needle 7, which is suitably connected to the needle lever 3. The presser foot 8 is of the usual construction and will not need-further" description. Cooperating wi-tha needle 1111-;

derneath the work support is e. 1ooper'9, which is pivoted at 10 to alooper support 11. Saidlooper receives its vibration from link 12,-which is pivoted to the, needle lever in the usual manner. The feed dog 13* is secured inany suitable manner to a feed-bar.

14, which is pivoted at 15 to aevvinging.

frame 16, fulcrum'ed at 17 on the bed plate 1.

Said frame 16 receives its rocking movement through an arm 18, wlnch'is pivoted at its forward end to aflink 19,-com1ected in" turn to a crank-pin adjustably se'oured to the disk 20, carriedo n the forward end of the shaft 4. This means for rocking the swinging frame- 16, and g'ivingtothe feed dog its cam on the main shaft directly underneath the feed .ba-r-, which cam; would give the vertical movements to the feed bar. Considen ahi disadvantage has been found, however, from using' .a'fmechanism of thls-character. espec-ally on machines working on material containing conside-rahle grit, as f the 1 love.

ments'ofthe feed dog would cause the grit to fell upon the. feed ca-m and soon vear away the same, so that a new cam would have to be substituted.

- One of the objects of my invention is the doing away of this three-cornered feed cam and substituting therefor a positive link.

motion, which will give to the feed dog proper feeding movements. To this end, I have formed integral with the feed bar a forwardly and downwardly projecting frame 21, which frame extends underneath spectively. Said links and 26 at their upper ends are pivoted respectively to lugs 2 and 28, carried by the looper support 11. The link 26, as shown in the present embodiment of my invention is forked at eachend,

and a suitable pivot pin connects said link to the frame, and also to the projecting lug. In the present embodiment of my invention, I have shown the lugs 27 and 28 as formed integral with the looper frame. The loopersupporting-frame 11 at'its forward end is secured to a stud 29 mounted in a bracket on the work support, and at its other end is secured to a short shaft 30 which extends through brackets 31 and 32 carried by the bed plate 1 and carries a crank arm 33, on its outer end. Said crank arm 33 carries a ball stud 34, at its outer end, which engages a suitable socket in an eccentric strap 35, coiiperating with an eccentric 36 on the main shaft 4.

The operation of my device is as follows:

The feed bar is moved laterally to feed the fabric by the swinging of the rocking frame 16. The feed bar receives its vertical movements through the combined action of the lateral movements of the feed bar and the swinging movements of the looper support. When the looper support swings about its axis through the action of the eccentric 36 on the main shaft, the lugs carried thereby and connected to the swinging links move the upper end of said swinging links in the arc of a circle about the axis of the looper support. At the same time, the feed bar moves laterally, swinging "the lower end of said links. When the parts are in the position shown in Fig. --4, the feed dog is ris ing above the work support into engagement with the fabric, so as to begin its forward or feeding movement. At this time, that is the beginning of the forward movement the looper-supporting shaft is being rocked by the eccentric 36., to'brmg the looper into proper position for its forward movement, orm the direction of the arrow, as shown 1n Fig. 4.' Asthe pivotal point a of the swinging link moves backward, the pivotal point b is slightly raised, and the resulting movement is a movement of the feed bar or feed dog substantially parallel with the work support. When the pivotal point a is substantially under the pivotal point I), there is little or no movement of the looper support,

but owing to the position of said pivotal points'the feed dog will still move in a line substantially parallel to the work support. f

After the pivotal points above referred to reach the position shown in Fig. 3, the'feed dog has practically completed its forward movement, and the looper support is now oscillated in the opposite directionto givea needle-avoiding movement to the looper. At this time the pivotal point a is substantially under the pivotal point I), and as the looper support swings in the direction of the arrow Fig. 3, it will be seen that the feed dog will be quickly lowered beneath the 1 work support. It will, therefore,'be seen that the looper support with the arm for operating the same, and also the projecting arms to which the links are attached, form' a lever, the axis of which is the axis of the looper support, which lever operates'to give the feed-dog its rising and falling movements.

In Fig. 9 I have shown on anenlarged scalethe path of movement of the feed dog inmy'cylinder machine. The path of movement of the feed dog in a flat bed ma,

chine, would bepractically the same, the

only difference being that the upper end of the link in the that bed machine moves in the arc of a circle, as indicated in the dotted lines :r-cc in said figure. This direction of movement, 'however, has1 little or no eifect upon the path of movement of the feed dog.

In the modification shown in Fig. 6, the

work support 37 has a forwardly projecting cylindrical bed plate 38. The feed dog 39 is mounted in any suitable way on the forward end of the feed bar 40. Said feed-bar 40 is supported at its forward end by a lever 41, pivoted at 42 to the work support. Said lever at its forward end is forked, providing spaced arms 43 and 44. The arm 44 carries a a swinging link 45, which is pivoted thereto at 46, while the arm 43 carries a swinging.

link 47 secured thereto by a pivot pin 48.

The feed bar 40 is preferably cut away centrally, so as to lighten'the same, and near its forward end said eed barcarries a downwardly projecting curved arm 49, '120.

which, as shown in the present embodiment of my invention is formed integral with said feed bar. The downwardly projecting arm 49, extends between the spaoedarms'43 and 44, and carries a bearing '50 at its forward end, in which 1s located a short shaft 51,' tQ

the outer ends of which are secured thfl l k 45 and 47. The lever 41 at its'rear end'cam work support is indicated by th'e line z-z.

, ters Patent, is-:

insane? feed bar 40, near its-rear end is cut out, forming a rectangular slot 5a, which receives a fiat pin 55, having its outer ends rounded to engage suitable bearings in the 5 bed plate, so that said pin may turn freely therein. A plate 56 is secured to the feed bar 40, and serves as a means to retain the fiat pin in the recess 54. Said pin 55 serves as a means for supporting the rear end of the 'feed dog, and it will be obvious that said feed dogmay be moved laterally. and turned about the'axis of said pin 55.

As a means for-reciprocating the feed bar -10, I have prov-id edthe rear endthere'of with a stud-57, towhich issecured a link 58. The opposite end of the; link 58 engages a pin 59, adjustably mountedin-a slot 60, in one arm of a rock lever :61, .pivoted-at 62 to the bed plate. The other arm ofuthe rock'lever 61 carries a ball stud 63,:which-engages an eccentric strap 64', coiiperating with an eccentric 65. on the main shaft 53. shaft 53 rotates, zthe rock lever =61 --will be oscillated andimpar-t to'the feed -bar lateral or feeding movements. At the same time,

the eccentric strap 52 is 'reciprocated, which vibrates the lever 41, and gives to the upper end of the links -15 and 47 a substantially vertical movement. lhe combined action of the lateral movements of the feed bar 40 and the up and down movements of the links -15 and 4:7, produce a movement in the feed dog which is substantially parallel with the work support during-the entire feeding movements, as showmin Fig. 9, wherein the In this Fig. 9, the circle 3 indicates the travel of the feed dog, while the circle 6 indicates the lift of the feed dog and the curved line p'indicates the path of movement of a point in the feed dog. In view of the diagrammatic view given, it is not thought that further description of the opthe feed dog into and out of engagement with the fabric-including parallel links disposed on opposite sides of the line of feed arid at their lower ends'connected with said outer-ends of thearm, and'means for supi-porting said links and moving the same up f and down.

2, A fee-ding mechanism including in com; binati'on. a work support, a feed dog, a feed bar having an arm provided wlth spaced fnite'r ends,'means for giving said feed dog secure by Letmovements to feed the fabric, means to more said feed dog into and out of engagement with the fabric, including spaced parallel links pivoted to the outer spaced ends of the arm carried'by said feed bar and disposed on opposite sides of the line of feed, a lever having arms to which said links are pivoted attheir upper ends.

3. A feeding mechanism including in combination, a work support, a feed dog, a feed ba-i, an arm carried by said feed bar and projecting downwardly and forwardly therefrom, the forward end of said arm being forked, links pivoted at their lower ends to said forked arm and disposed on opposite sides of the line of feed, and a lever to which said links are pivoted at their upper ends.

4. A feeding mechanism including incombination, a work support, a feed dog, a feed bar, an arm carried by said feed bar and I projecting downwardly and forwardly therefrom, and having its forward end forked, 'a lever, the axis of which is substantially perpendicular to the plane of-movement of the feed dog. said lever havingspaced arms, links pivoted at the lower ends to-the forked end of thearm on said feed-bar, and at their upper ends to the arms of said lever.

' 5. The combination of a main shaft, a feeding mechanisinincluding a feed rocker. means .for oscillating the same from said shaft, a feed bar pivoted at one end to said feed rocker, a feeddog carried by said feed bar, a looper support extending in a-direction substantially at right angles to the plane of movement of the feed bar, means for oscillating said looper support. a looper mounted on said loo'per support, means foroscillating said looper and means operated by said looper support and connected to the other end of the feed bar for. giving said feed bar its risingiand falling movements.

6. The combination of a main shaft. a feeding-mechanism including a feed rocker, means for oscillating the same from said main shaft, a feed bar pivoted at one end to said feed rocker. a feed dog carried by said feed bar, a looper support extending in a direction substantially at right angles to the plane of'movement of the feed bar, a looper mounted on-said looper support. means for oscillating said looper, means for oscillating Said looper support from said main shaft. a

link connecting said looper support to the other end of said feed bar. whereby the oscillation'of said looper support will give the rising and falling movements to said feed bar'.;-

7. The combination of a main shaft, a feeding mechanism including a feed rocker,

- means for oscillating'said feed rocker from said shaft, feed her pivoted at one end to saidfeed rocker, a feeddog carried by said feed'bar. said feed bar having an arm extending downwardly and forwardly, there- 30 spaced arms, and means for oscillating said from, a looper support extending substantially at right angles to the plane of movement of the feed bar, alink pivoted at its lower end to said arm and at its upper end to the looper support, a looper mounted on saidlooper support, means for oscillating the looper, and means for oscillating the looper support.

8. The combination of a looper, a looper at their up er ends.

.9. The combination of a feeding mechanism including a feed dog, a feed bar, an arm carried by said feed bar projecting downwardly and forwardly therefrom, said arm being forked at its forward end to form spaced members, a looper support having its aids perpendicular to the plane. of

. movement of'said feed dog, said looper support having spaced arms, links pivoted to the spaced arms on said looper support, and to sald spaced members, a looper carrier pivoted to said looper support between said looper carrier.-

v 10. The combination of a main shaft, 'a feed dog, a feed bar carrying said feed dog, a rocking frame to which said feed bar is pivoted, means for oscillating said rocking frame from said ma'in shaft, said feed bar carrying an arm which projects downwardly beneath the main shaft and forward of the same, a looper support parallel with said main shaft, means for oscillating said looper support fromsaid main shaft, and a link connected to said arm carried by said feed bar and to said looper support.

11. A sewing machine. including in combination, a needle, a looper, a looper.-sup-' port, means for giving said looper looptaking and loop-leaving movements on said support, a feeding mechanismincluding a feed bar, means for moving the feed bar back and forth, a feed dog carried by said feed bar, meansfor connecting the feed bar to the looper support, and means for opera ating said looper support to give said looper its needle-avoiding and to give said feed bar its rising and falling movements. j 12. In a sewing machine, a needle, a looper, means forgiving said looper looptaking and loop-leaving movements, means to give said looper a needle-avoiding movement, a feeding mechanism including a feed dog, a. feed bar supporting said feed dog,

means for moving said feed bar to give said feed dog its feeding movements, and means operated by said means for giving the looper ing said feed dog up and including aswinging arm, and a link curved a v on the arc of a circle connecting said arm 95 the feed dog into and out of engagement with the fabric.

13. In a sewing machine, a needle, 8.. looper, a looper support on which said looper is pivoted, means for swinging said looper on its pivot into and out of the needle loop, means for oscillating said looper support for giving said looper a'needl-avoiding movement, a feed dog, and means connected with said oscillating looper support for giving said feed dog one of its movements. V 14. In a feeding mechanism, a. main shaft, a feed dog, a bar for supporting said feed dog, a vibrating part upon which said feed dog is pivoted, said feed bar being formed of two forwardly projectingarms connected by a cross bar, said cross barbeing located between the pivotal point of the feed bar and the main shaft, whereby it can be removed without removal of the main shaft and means connected with one ofsaid arms for raising and lowering said feed bar.

15. A feeding mechanism for sewing machines, including in combination, a feedsix dog, a feed bar, means for, giving said feed dog lateral movements, and means forgiv to said feed bar.

down movements,

-16. In a sewing machine the combination of a looper mechanism, including a looper supporting member, a feeding mechanism, including a vibrating part, a feed bar pivoted thereto, and means for pivoting loo said feed bar to said looper support, whereby said looper support ma feed bar a rising and falling; movement.

17. In a sewing machine, the combination of a looper mechanism .incll'ldinga rocking frame, a rocking member carried by said impart to said frame, a looper supported by said rocking member, and a. fee' mechanism including 5 I a feed dog, a rocking ,frame connected to said ,feed dog, the direction of movement :of

the looper supporting member and the rockmg frame being opposite to one another.

1 In a sewing machine, a looper mechanism including a looper support, a looper pivoted to said looper support,-means for vibrating said looper on said support, means for vi rating said looper support, a feeding mechanism including a feed bar, a vibrating part to which saidfeed bar is connected, an arm carried by said feed bar, an arm carried by said looper support, and a link for pivotally connecting said arms.

' 19. In a sewing machine, the combination of a main shaft, an oscillating support, 10-

' cated adjacent said shaft, means for oscillating said support from said shaft, a looper pivotally supported on support, a feed 'ing mechanism including a feed bar, a vi-- brating part to which said feed bar is ,pivot 3 tending underneath said shaft and said 0sed, arm carried by said feed bar and exmllatlng support for the looper, an arm carried by the looper support and a link for connecting said arms.

- 20. A sewing machine including'in combination, (rated adjacent said main shaft, means for oscillating said support from said shaft, :1. iooper pivoted to said support, means for vibrating said looper on its pivot, a feeding mechanism including a rocking frame, a feed a main shaft, a looper support 10'- b pivoted to said rocking fiamg 'mms' for rocking said frame from said aft, an arm carried by said feed bar, extending. un- 15 demeath said shaft, and a looperi support an arm carried by the looper support, an a link for connecting said arms. In testimony whereof I affix mysignature; in presence of two witnesses. v DUDLEY S. SEYMOUR; Witnesses:

O.-MONnm, R. TAtmERT. 

